Tellurian.



W. PARK.

. TELLURIAN.

APPLICATION FILED APR.24, 1914.

Patented Apr.13, 1915.

THE NORRIS PETERS C0,. PHOT0-L!THO., WASHING rON. D. L

WILLIAM PARK, 0]? BRANTFGRD, ONTARIO, CANADA.

TELLURIAN.

aiaaeoa.

Application filed April 24, 1914.

To all whom it may concern Be it known that I, WILLIAM PARK, of the city of Brantford, county of Brant, Province of Ontario, Canada, have invented certain new and useful Improvements in Tellurians, of which the following is a specification.

This invention relates to tellurians including a sun globe and an earth globe, and preferably also a moon globe, so connected and mounted that the earth may be rotated on its axis and also carried about the sun globe with its axis constantly pointed in the same direction, and, if a moon globe be employed, so that the latter may be rotated about the earth; and my object is to provide means whereby the instrument not only shows the positions assumed by the aforesaid bodies which determine the dura tion of day and night at different positions on the earths surface, but also presents an actual picture of the position in the visible sky of the sun and moon as viewed from the earth. With such apparatus such phenomena as the midnight sun, the suns altitude at different seasons, the relative altitudes of the sun and moon at difierent seasons, and the paths of these bodies across the sky may be graphically demonstrated.

I attain my object by applying to the earths surface a number of small reflecting hemispheres of polished metal or silvered glass. These will usually be applied in a series on the same meridian and any number may be employed, but I prefer to use at least seven, one at the Equator, one at each pole, one at each tropic and one each at the Arctic and Antarctic Circles.

The invention is illustrated in the accompanying drawings in which Figure 1 is a side elevation of the tellurian constructed in accordance with my invention, Fig. 2 a side elevation of the upper part of the earth globe in the position it assumes at the time of one of the equinoxes; and Fig. 3 a detail in side elevation of one of the hemispherical mirrors which are ap plied to the earths surface.

In the drawings like numerals of reference indicate corresponding parts in the different figures.

1 represents part of the stand on which is supported the sun globe 2. This may be either an opaque globe suitably colored, or a translucent globe illuminated from within. On this stand concentric with the vertical Specification of Letters Patent.

Patented Apr. I3, I915.

Serial No. 834,149.

axis of the sun globe is journaled an arm 3. On the outer end of this arm is journaled an arm 4:, to which, and at right angles thereto, is secured the axis 5 of the earth globe 6. The arm 4 is suitably bent or inclined to give the earths axis its proper inclination of 23 28 to the plane in which the arm 3 rotates. The earth globe 6 is suitably journaled on the axis 5. Concentric with the journal of the arm 4, the arm 7 is suitably journaled on the end of the arm 3. This arm 7 carries the moon globe 8, which may be of any suitable construction. As for the purposes of the present invention the necessary movements of the earth and moon globes may be effected by hand, I show no means for moving the arms 3, 4 and 7, nor for rotating the earth on its axis, but if such mechanism be deemed desirable it may be constructed substantially as in United States Patent No. 1,067,517, dated July 15th, 1918, issued to Wm. F. Gunson and Wm. Park.

'The earth globe for my present purposes does not need to have the physical configurations of the earth marked thereon, but it is desirable to have suitably marked thereon lines representing the Equator, the Tropics of Cancer and Capricorn, the Arctic and Antarctic Circles and certain of the meridians.

The novel feature of the present invention lies in the use with the earth globe of one or more small hemispherical mirrors 9 which may be formed either of polished metal or silvered glass. While one only of these mirrors may be employed and moved to different positions on the surface of the earth globe as may be requisite, I prefer to employ at least seven located as hereinbefore described. Each mirror reflects the image of the sun globe and I find that if the observer is properly placed, that is, with his eye substantially in line with the earth and sun globes, the latter being between his eye and the earth globe, that the hemispherical mirrors reflect or display with substantial accuracy the position of the sun in the visible heavens at any given time, and also the path of the sun in the visible heavens as the earth rotates on its axis. By the use of these mirrors I can demonstrate the exact length of the daylight at any desired latitude on the earths surface at each season of the year, and am enabled very vividly to illustrate the phenomenon of the midnight sun-at and beyond the Arctic and Antarctic Circles. The path of the sun in the visible heavens at the North and South Poles may be Well seen and the phenomenon offsix months" day and six months night. At the same timethat the actual appearance of any givenphenomenaj is thus shown, the

- therelative positions of the path of the sun V andmoon in the sky at different'seasonsof various positions of the heavenly. bodies concerned as Viewed from space, are shownbythe apparatus. p

.When Lthe 'moon globe is. provided, the

apparent'path ofthemoon in the heavens at any. given season can beelearlyseen, also the year. The times of the rising and setting of themoon atany date and any.

partIof-the earths surface may be shown I [I and the reasonsfor the rising of the moon 2 0 at a-later hour' each night.

' 'The hemisphericalmirrors may be secured tothe earthglobe permanently in any suitable manner; but if it is desired to make them removable so that any mirror may be placed in any desiredposition, each mirror 9i'may be providedwith a short pin '10,

Which may be inserted in a hole formed in the surface of the earth globe. These holes may be located Wherever experience shows globe; an earth globe; an inclined axis on which the earth globe is journaled; a small hemispherical convex mirror applied to the surface of the earth globe; and means whereby the earths axis may be given varying positions relative to the sun corresponding to theseasonal changes.

3. In a tellurlan, the combination of a sun globe; an earth globe; an inclined axis on 'Which the earth. globe is journaled; and a plurality of small hemispherical convex mirrors applied to the surface of the earth globe at different latitudes. I

4. In a tellurian, the combination of an earth globe; an inclined axis on which the earth globeQis journaled; a moon globe; means for carrying themoon globe about thejearth globe; and a small hemispherical convex mirror applied to the surface of the earth globe.

5. In a tellurian, the combination of a sun globe; an earth globe; an inclined axis on which the earth globe is journaled; a moon globe; means for carrying the moon globe about the earth globe; means whereby the earths axis may be given varying positions relative to the sun corresponding to seasonal changes; and a plurality of small hemispherical mirrors applied to the surface of the earth globe at different latitudes.

Signed at Toronto, Ont, this 16th day of April, 1914, in the presence of the two undersigned Witnesses.

WILLIAM PARK. 7 Witnesses:

E. P. HALL, GEO. P. MAGKIE.

Copie s. of this patent may be obtained for five cents each, by addressing the Commissioner of'Iatents,

' Washington, D. G. V 

